Shoe tree



FIG. 1 is a top plan view of a shoe tree, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof, the opposite side being a mirror image thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a shoe tree, as shown and described. 